Sadie Frost has spoken of her struggle with depression during her marriage to actor Jude Law, admitting she once slashed her arm with a pair of scissors.

The celebrity couple's high-profile relationship ended in divorce in 2003 after they had three children together.

Sadie was a 25-year-old married mother-of-one when she met Jude, who was then a 19-year-old unknown.

In her autobiography out next month, the actress-turned-fashion designer describes the instant attraction they felt.

In serialised extracts of Crazy Days, which appeared in the Mail on Sunday, Sadie said: "I knew by even entertaining thoughts of Jude, I was jeopardising an idyllic home life, the most secure relationship I'd ever had."

But, she added, her love and his "intense ambition" made her feel "out of control".

Sadie, now 45, went on to leave husband Spandau Ballet star Gary Kemp before she and Jude moved in together to her Primrose Hill home in north London.

But with Jude's Hollywood career taking off, he spent long spells away filming and Sadie said she pressed the "self-destruct" button after the birth of their son Rafferty in 1996.

Describing the moment post-natal depression took hold, she said: "I watched my hand slowly pick up a pair of scissors. It was as if I was being sucked down lower into the chair and the scissors seemed to be drawn to my arm. I appeared to have cut myself. Blood dripped down my arms. There was no sense of panic within me - I just felt empty."